Tungsten grain separation during initial stage of liquid phase sintering
2008 (English)In: Powder Metallurgy, ISSN 0032-5899, Vol. 51, no 4, 343-349 p.Article in journal (Refereed) Published
The initial stage, the first few seconds of liquid phase sintering has been investigated in experiments using a tungsten heavy alloy with low tungsten content. The heavy alloy has been melted in a temperature gradient for short periods, similar to 9 s in an ellipsoid mirror furnace. During the liquid phase sintering at about 1470 degrees C, a penetration followed by a remarkably rapid separation and dispersion of the tungsten grains by the molten matrix occur. The suggested explanation for this grain separation and dispersion is based on the effect of composition gradients in the liquid matrix and a theory based on interagglomerate melt swelling due to a Kirkendall effect.
Place, publisher, year, edition, pages
2008. Vol. 51, no 4, 343-349 p.
Liquid phase sintering, Heavy metal, Particle composites, Tungsten, Agglomerate separation, Kirkendall effect, diffusion, penetration, growth
IdentifiersURN: urn:nbn:se:kth:diva-18149DOI: 10.1179/174329008x293732ISI: 000263029100029ScopusID: 2-s2.0-65549145046OAI: oai:DiVA.org:kth-18149DiVA: diva2:336195
QC 201005252010-08-052010-08-05Bibliographically approved